How do I calculate the Yield to Maturity on a T bill?

Treasury Bills have a maturity of less than 12 months, have no coupon rate, and are issued at a discount to the par value. When a U.S. Treasury Bill matures it pays the par value only and pays no additional coupon interest. The returns the investor earns for a T-Bill is the difference between the purchase price and the maturity price…

IBKR will grant shares to a referred client’s IBKR account based on the net fair market value of assets deposited into the referred client’s account. The value of assets transferred in is computed using the closing price for the business day before IBKR learns of the transfer (date “T”). Specifically, market value is calculated as Quantity * Closing Price on T-1. IBKR shares will then be granted using the IBKR Closing Price on the day the transfer is processed. …

The 'Yield' displayed in the trading platform is the 'Yield to Worst (YTW)' which is the lesser of the Yield to Maturity or the Yield to Call (the next call date of the bond, if applicable).

The YTW ('Yield') differs from the current yield (coupon/market price ) and notional yield (coupon/face value), as it accounts for all future cash flows which therefore allows for comparing bonds of different coupons and maturities on a standardized level. It is essentially the Internal Rate of Return (IRR) of a bond investment, and assumes the following elements:…

A bond’s day count convention is used to determine the number of days and calculate the amount of accrued interest due between a bond’s coupon payment dates.   

US Corporate Bonds often use a 30/360 day count while US Treasuries generally use Actual/Actual, however, this can vary and investors should consult the bond’s prospectus or contact the issuer to confirm the specific method being used for a particular bond…